8000 RP2/machine_uart.c: Fix poll ioctl. · micropython/micropython@19e16d9 · GitHub
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iabdalkaderiabdalkader
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RP2/machine_uart.c: Fix poll ioctl.
* The RX IRQ does not trigger if the FIFO is less than the trigger level. * Use machine_uart_any to check for readability to drain the RX FIFO.
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‎ports/rp2/machine_uart.c

Original file line numberDiff line numberDiff line change
@@ -477,7 +477,7 @@ STATIC mp_uint_t machine_uart_ioctl(mp_obj_t self_in, mp_uint_t request, mp_uint
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if (request == MP_STREAM_POLL) {
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uintptr_t flags = arg;
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ret = 0;
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if ((flags & MP_STREAM_POLL_RD) && ringbuf_avail(&self->read_buffer) > 0) {
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if ((flags & MP_STREAM_POLL_RD) && (uart_is_readable(self->uart) || ringbuf_avail(&self->read_buffer) > 0)) {
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ret |= MP_STREAM_POLL_RD;
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}
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if ((flags & MP_STREAM_POLL_WR) && ringbuf_free(&self->write_buffer) > 0) {

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